Valve Springs – Econo Beehive – Twin Cam

Made from premium stress-relieved conical ovate wire; Feature extremely high-level of fatigue life; Use a much smaller and lighter weight retainer to reduce valve weight and create quicker rev and smoother motion; Designed to handle the demands of performance engines with 0.585″ and smaller lift camshafts; Kit includes: Econo BeeHive® valve springs, lightweight 7° steel retainers, machined heat-treated chromoly spring seats, seat shims, valve locks and a set of premium Viton® valve seals equipped with spring-loaded valve stem wiper system; Seat lbs./installed height; 183 lbs. at 1.770″ (0.510″ lift); 175 lbs. at 1.795″ (0.535″ lift); 172 lbs. at 1.813″ (0.553″ lift); 165 lbs. at 1.835″ (0.574″ lift); 160 lbs. at 1.845″ (0.585″ lift); 380 lbs. at 1.260″ open height coil bind at 1.190″; Dyno proven and track tested; Feuling® BeeHive® valve springs must be installed at the correct open height, matching max lift to the open height spec of the valve springs; Made in the USA; Econo BeeHive® kits are direct replacement with no machining or rocker box clearance required for cams up to 0.574″ lift for 84-04 Big Twin and 86-03 XL and up to .585″ lift for 05-17 Twin Cam.